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annotate libinterp/parse-tree/pt.cc @ 26113:8a15f3bace49

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move eval_string inside interpreter/evaluator class * tree_evaluator.h, tree_evaluator.cc (tree_evaluator::eval_string): New functions. * interpreter.h, interpreter.cc (interpreter::eval_string): New functions. Forward to evaluator eval_string functions. * parse.h, oct-parse.yy (eval_string): Deprecate and forward to interpreter eval_string functions. Change all uses. * pt.h, pt.cc (tree::meets_bp_condition): Accept reference to tree_evaluator as argument. Change all uses. (tree::is_breakpoint): Split into separate is_breakpoint and is_active_breakpoint functions. Change all uses.
author John W. Eaton <jwe@octave.org>
date Fri, 16 Nov 2018 13:16:50 -0500
parents cb1606f78f6b
children 00f796120a6d
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1 /*
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2
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3 Copyright (C) 1996-2018 John W. Eaton
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4
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5 This file is part of Octave.
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6
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7 Octave is free software: you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by
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9 the Free Software Foundation, either version 3 of the License, or
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10 (at your option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but
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13 WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <https://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #if defined (HAVE_CONFIG_H)
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24 # include "config.h"
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25 #endif
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27 #include <sstream>
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28 #include <string>
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29
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30 #include "ov-fcn.h"
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31 #include "pt.h"
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32 #include "pt-eval.h"
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33 #include "pt-pr-code.h"
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34 #include "unwind-prot.h"
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35
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36 namespace octave
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37 {
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38 // Hide the details of the string buffer so that we are less likely to
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39 // create a memory leak.
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40
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41 std::string
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42 tree::str_print_code (void)
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43 {
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44 std::ostringstream buf;
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45
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46 tree_print_code tpc (buf);
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47
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48 accept (tpc);
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49
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50 std::string retval = buf.str ();
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51
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52 return retval;
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53 }
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54
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55 // Is the current breakpoint condition met?
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56
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57 bool
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58 tree::meets_bp_condition (tree_evaluator& tw) const
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59 {
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60 bool retval;
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61 if (m_bp_cond == nullptr)
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62 retval = false;
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63 else if (m_bp_cond->empty ()) // empty condition always met
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64 retval = true;
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65 else
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66 {
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67 int parse_status = 0;
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68
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69 unwind_protect frame;
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70 frame.protect_var (buffer_error_messages);
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71 frame.protect_var (Vdebug_on_error);
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72 frame.protect_var (Vdebug_on_warning);
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73
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74 buffer_error_messages++;
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75 Vdebug_on_error = false;
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76 Vdebug_on_warning = false;
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77
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78 retval = true; // default to stopping if any error
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79 try
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80 {
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81 octave_value_list val
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82 = tw.eval_string (*m_bp_cond, 1, parse_status, 1);
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83
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84 if (parse_status == 0)
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85 {
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86 if (! val(0).is_scalar_type ())
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87 warning ("Breakpoint condition must be a scalar, not size %s",
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88 val(0).dims ().str ('x').c_str ());
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89 else
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90 retval = val(0).bool_value ();
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91 }
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92 else
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93 warning ("Error parsing breakpoint condition");
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94 }
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95 catch (const execution_exception& e)
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96 {
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97 warning ("Error evaluating breakpoint condition:\n %s",
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98 last_error_message ().c_str ());
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99 }
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100 }
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101 return retval;
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102 }
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103 }